Fix material for use in puddling and basic open-hearth furnaces.



the furnace charge a the lime required for purifying the charge,

STTES J OHNJ. DERY, OF

NEW YORK, N. Y.

Y FIX MATERIAL FOR USE IN PUDDLING AND BASIC OPEN-EARTH FURNACES.

no Drawing.

To all whom it may concern.

Be it known that I, JOHN F. DERY, a citizen of the United States, residing at New ork city, in the county of New York and State of New York, have invented certain new and useful Improvements in Fix Material for Use in Puddling and Basic Open- Hearth Furnaces, of which the following is a specification.

This invention relates tolthe puddling and basic open hearth treatments of iron, and it has for its objects to provide, in block or lump form for use as fix in .such furnaces, a composition of matter which shall contain, with flue-dust, iron fines, or other comminuted form of iron, material giving ample power to the blocks or lumps to resist disruption incident to handling and shipping and the disintegrating and fusing action of the furnace heat and supplying to definite percentage 0 without also bringing to the latter constituents having in a prohibitive degree acid or on the same.

other deleterious effect no one has here- So far as I am aware,

tofore successfullyaccomplished the object outlined above. Various more or less successful attempts have been made to compound iron fines and flue dust in blocks or lumps, but although the blocks or lumps in those cases may have perhaps possessed the strength required for withstanding rough usage and the needed degree of resistance to heat and disintegration, they were capable of being used only in the blast furnace,

because they invariably contained a perother ingredients,

would have the necessary and in most cases included entirely prohibitive in the case of the puddling andba'sic open hearth treatments. The problem has principally been tov produce a compound whose binder strength and the ower to resist disintegrating and fusing action of the furnace heat, without at the same time containing s'lica in a proportion centage of silica,

these furnaces. The usual limit of silica in fix ores is about'7%. I have attained the desired object by the compound herein set forth.

According t the preferred form of my invention, I take of lime one part', Portland cement two parts, and iron fines or flue dust nine parts, and mix these ingredients together thoroughly, with enough water to Specification of Letters Patent.

' Patented Mar. 21,1916.

make the mixture sufficiently fluid to be poured into molds, and when the mixture has been poured into the molds and dried in any manner calculated to produce the best results in point of strength and heat-resisting power (as by removing the mold walls after the formed blocks are two days old to allow air to circulate freely around them and sprinkling them once a day thereafter for three days) the resultant blocks are ready for use.

Blocks formed from the compound herein set forth have great strength-ample to resist the disrupting influences incident to handling and.shipping-and they have high heat-resisting power, a test block of the size of a two inch cube having been subjected by.

a5 while the quantity of silica is low enough to meet the requirements of puddling and operators.

While I find that Portland cement best subserves the objects of my invention, I am nevertheless not limited thereto, as any other basic aliunino-silicate cement which will give the ,and the power to resist to the desired degree the fusing action of the heat and also toresist disintegration in the furnace, and, when used in the proper quantity to attain this end, will at the same time silica to bring this element within. the limit mentioned above, falls within the .scope of my invention.

Should the-fines or flue dust carry silica in such a quantity that the compound would basic open hearth be too high in silica it may be treated, as in a separating mill or otherwise, to reduce the proportion of silica.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is 1'. The hereindescribed basic open hearth or puddling furnace'fix compound containbe low enough in ing comminuted m and a binder contributing to the compound silica in a quantity not exceeding 7% of the whole'mass, the binder including lime and a basic aluminosilicate cement and the iron and binder being in substantlally the parts to 1, respectively.

2. The hereindescribed basic open hearth or puddling furnace fix compound containing' comminuted iron, lime and a basic alumino-silicate cement contributing to the compound. silica in a quantity not exceeding proportion of 3 minuted iron, nlne 7%fof the whole mass, their-on, cement and e being in approximately the following proportions, to wit: iron, nine parts; cement,

two parts; andlime, one part.

c herein" described basic open hearth or puddling furnace fi'x compound contain ing the following ingredients in approximately the proportions-named, to wit comparts; Portland cement, two parts; and lime, one part.

In testimony whereof I aflix my signature.

JOHN F. DERY. 

